What is a Bushfire Attack Level (BAL) Rating?

A Bushfire Attack Level (BAL) Assessment is a statement of your Bushfire Attack Level (BAL) rating in the form of a certificate and report. The report gives detail about why you are that rating by the classification of vegetation in a 100 m radius around your development and measuring the separation distance from classified vegetation.

The heat flux that a structure would be exposed to in case of a bushfire is what denoted your Bushfire Attack Level (BAL) rating and is measured in kW/m2.

According to the Australian Standards AS 3959, bushfire intensity levels are divided into 6 Bushfire Attack Levels (BAL):

  1. BAL Low
  2. BAL 12.5
  3. BAL 19
  4. BAL 29
  5. BAL 40
  6. BAL Flame Zone

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